Pelto, Pertti J.
Harper & Row, Publishers, 1970
Buku Teks
Pelto, Pertti J.
Cambridge University press, 1978
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Tennant, Kylie
Macmillan, [Date of publication not identified]
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Matindas, Victor G.P.
Fakulats Ekonomi dan Bisnis Universitas Indonesia, 2016
UI - Tesis (Membership)
Smith, Anthony Paul, 1982-
Polity Press, 2016
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